<template>
  <view class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goodsDetail.pics" :key="i">
        <image :src="item.pics_big"></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息 -->
    <view class="goods-info-box" v-if="Object.keys(goodsDetail).length>0">
    <!-- <view class="goods-info-box" v-if="JSON.stringify(goodsDetail) !=='{}'"> -->
      <!-- 商品价格 -->
      <view class="price">￥{{goodsDetail.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goodsDetail.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费{{cart.length}}--{{total}}</view>
    </view>

    <!-- 商品详细介绍 -->
    <rich-text :nodes="goodsDetail.goods_introduce"></rich-text>

    <!-- 商品导航 -->
    <view class="nav-container">
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import { mapState, mapMutations, mapGetters } from 'vuex'
  
  export default {
    data() {
      return {
        goodsDetail: {}, // 产品详情
        
        options: [{
                    icon: 'shop',
                    text: '店铺',
                }, {
                    icon: 'cart',
                    text: '购物车',
                    info: 0
                }],
                
      buttonGroup: [{
                  text: '加入购物车',
                  backgroundColor: '#ff0000',
                  color: '#fff'
                },
                {
                  text: '立即购买',
                  backgroundColor: '#ffa200',
                  color: '#fff'
                }]
      };
    },
    computed:{
      ...mapState('m_cart', ['cart']),
      ...mapGetters('m_cart', ['total'])
    },
    watch:{
      // 普通定义方式
      // total(newTotal){
      //   console.log('new total', newTotal)
      //   this.options[1].info = newTotal
      // }
      // 完整定义,对象方式
      total: {
        handler(newTotal){
          this.options[1].info = newTotal
        },
        immediate: true
      }
    },
    onLoad(options) {
      const goods_id = options.goods_id
      // 发起网络请求
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addCart']),
      // 获取产品详情
      async getGoodsDetail (goods_id) {
        console.log(goods_id)
        const {data: res} = await uni.$http.get('/goods/detail', {goods_id})
        console.log(res)
        // 异常判断
        if(res.meta.status !== 200) return uni.$showMsg()
        
        // 修改数据结构（后端返回结构不符合前端显示需求）
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="vertical-align: middle;"')
                                                                 .replace(/webp/g, 'jpg')
        // 设置页面数据
        this.goodsDetail = res.message
      },
      onClick(e){
        console.log('左边',e)
        if(e.content.text === '购物车'){
          // 跳转到购物车tab页面
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e){
        console.log('右边', e)
        if(e.content.text === '加入购物车'){
          console.log('==========')
          // 2. 组织一个商品的信息对象
          const goods = {
             goods_id: this.goodsDetail.goods_id,       // 商品的Id
             goods_name: this.goodsDetail.goods_name,   // 商品的名称
             goods_price: this.goodsDetail.goods_price, // 商品的价格
             goods_count: 1,                           // 商品的数量
             goods_small_logo: this.goodsDetail.goods_small_logo, // 商品的图片
             goods_state: true                         // 商品的勾选状态
          }
          
          
          this.addCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
  
  .goods-detail-container{
    
    padding-bottom: 50px;
    
    swiper {
      height: 750rpx;
      image {
        width: 100%;
        height: 100%;
      }
    }
    
    // 商品信息区域的样式
    .goods-info-box {
      padding: 10px;
      padding-right: 0;
      .price {
        color: #c00000;
        font-size: 18px;
        margin: 10px 0;
      }
      .goods-info-body {
        display: flex;
        justify-content: space-between;
        .goods-name {
          font-size: 13px;
          padding-right: 10px;
        }
        // 收藏区域
        .favi {
          width: 120px;
          font-size: 12px;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
          border-left: 1px solid #efefef;
          color: gray;
        }
      }
      // 运费
      .yf {
        margin: 10px 0;
        font-size: 12px;
        color: gray;
      }
    }
    
    .nav-container {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
    }
  }
 
</style>
